Current Capacity of Galvanic Anodes

The theoretical current content Q per unit mass, from Eqs. (2-3) and (2-6) is given by  

Correspondingly, the theoretical current content Q related to volume is given by Eqs. (2-3) to (2-7)  

Current content values Q and Q for the most important anode metals are given in Table 6-1. These data apply only to pure metals and not to alloys. For these the Q values corresponding to the alloy composition can be calculated from  

On the other hand, the difference between the theoretical and the usable current content due to self-corrosion is not negligible. This effect is taken care of 

The sum of all the cathodic partial reactions is included in Iq, e.g., oxygen reduction according to Eq. (2-17) and hydrogen evolution according to Eq. (2-19). The intermediate formation of anode metal ions of anomalous valence is also possible  

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